Questions & Answers about Lui è stanco oggi?
Why isn't the word order flipped like in English ("È lui stanco oggi?")?
In Italian, you don't need to change the word order to ask a yes/no question. You just use the exact same word order as a regular statement (Lui è stanco oggi) and make your voice go up at the end of the sentence.
Do I have to include the word Lui here?
What if I wanted to ask if a woman is tired?
Why does the letter e have an accent mark (è) in this sentence?
The accent mark shows that è means "is". Without the accent mark, the word e means "and". The accent helps you tell them apart when reading, and tells you to pronounce it with a slightly more open sound.